About mapping

createEntityManager(Mapmap) Create a new application-managed EntityManager with the specified Map of properties. Create a new application-managed EntityManager with the specified Map of properties. This method ... on the returned instance. Parameters: map - properties for entity manager Returns: entity manager

) Supports composite map keys that reference entities. The MapKeyJoinColumns annotation groups ... 2.0 See Also: MapKeyJoinColumn MapKeyJoinColumn[] value (Required) The map key join columns that are used to map to the entity that is the map key. (Required) The map key join columns that are used

that contains the column. Defaults: If the map key is for an element collection, the name of the collection table for the map value. If the map key is for a OneToMany or ManyToMany entity relationship using a join table, the name of the join table for the map. If the map key is for a OneToMany entity

of the foreign key column for the map key. The table in which it is found depends upon the context. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany

Object getUserObject(Object key) Get the value for the specified key from the map of user objects. Get the value for the specified key from the map of user objects. Parameters: key - the key of the object ... ) Put the specified key-value pair into the map of user objects. Put the specified key-value pair into the map

) This annotation must be specified for persistent map keys of type java.util.Date and java.util.Calendar. It may only be specified for map keys of these types. The MapKeyTemporal annotation can be applied to an element collection or relationship of type java.util.Map in conjunction

ManyToOne mapping using a foreign key mapping strategy, the foreign key column is in the table of the source entity or embeddable. If the join is for a unidirectional OneToMany mapping using a foreign key mapping strategy, the foreign key is in the table of the target entity. If the join